Homemade fire alarm control panel help

Hi I’m wanting to build a homemade fire alarm panel I have a couple of replays and switches and pull stations and lots of wire and I’ve tried to build one but it doesn’t work sadly I don’t think I have any latching relays but hopefully I can wire a regular relay to be latching, here are the parts I’m currently using but I have more relays of different types


Can you post a picture of what you have so far and how it is wired? What part of the world are you in? I may have an old panel to give you a start.

I actually got the panel working but would it be okay if I could see a picture of the panel you would give me?

I have several and didn’t have a specific one in mind. Autocall. Ansul, Pyrotronics, Honeywell.

You can make your own latching relays out of SPDT or DPDT relays. I drew up a single zone panel with silence and reset. Pretty easy.


Top pic shows a simple latch relay. You press the button and the relay will latch on until power is removed. If you wanted to power a horn until power is removed, just wire the device in parallel of the relay.

Ok someday I wanna either expand my panel or just buy a panel from eBay

I’m a little bit stupid kid but How can I add multiple nacs do I just put them on to one terminal block or something I’ve kinda done what is shown in the diagram but in the future I wanna add more nacs and pull stations but how do i add more nac terminals

Just add two terminals, + and -, and wire them off the current NAC terminal. You can add zones by adding more zone relays. You could then add LED’s to let you know which zone relay tripped. you would need diodes to keep from activating other LED’s. But you can play around and figure it out.

Wire the manual stations and NACs in parallel. No issue on the number of stations, but the number of horns will be limited by how much power the circuit provides.